Under hinge elevons

[thenated0g]

Im scratch building a slope plank using the pw1211 airfoil and i noticed somebody saying this is supposed to be "under hinged'. I hadnt heard this term and just wanted to see if this is a simple as just hinging your controls like the plane is upside down. Same hinge, but on the bottom, with relief on the top. Thanks.

 

[Konrad]

That's my take on the term. Hinge the high pressure (bottom) side of the airfoil.